Institutio Oratoria

In this connexion the chief essential is never for a moment to lose sight either of the question at issue or the end which we have in view. If we bear this in mind, we shall never descend to mere brawling nor waste the time allotted to the case by indulging in abuse, while we shall rejoice if our adversary does so.

Those who have given a careful study to the arguments that are likely to be produced by their opponents or the replies which may be made by themselves are almost always ready for the fray. There is, however, a further device available which consists in suddenly introducing into the debate arguments which were deliberately concealed in our set speech: it is a procedure which resembles a surprise attack or a sally from an ambush. The occasion for its employment arises when there is some point to which it is difficult to improvise an answer, though it would not be difficult to meet if time were allowed for consideration. For solid and irrefutable